This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

Inside this wonderland of weird, visitors are treated to a collection ranging from skeletons to haunted artifacts.

This 15-foot tall obelisk commemorating the Philadelphia-Baltimore railroad connection sat neglected for over a century.

Roman politician Herodes Atticus built this nymphaeum to honor his wife, whom he may have murdered.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

An amazing example of early-20th-century architecture, this church features marble transported from Utah.

For centuries, this large Roman villa remained hidden thanks to the eruption that buried nearby Pompeii and Herculaneum.